While reconstruction of ambient fillter pm2.5 gravimetric mass, i would like to know whether particle bound water in teflon filters would be present? If yes, then how would it different from quartz filters..? Would be helpful if elaborate explanation provided.
Note..the simultaneous measurements was done in teflon and quartz filter and gravimetric was done around 50 to 55 RH.
teflon was used for water soluble ions and metals whereas quartz for carbonaceous component.
I've already performed such analysis by comparing the ability of water sorption by non-exposed (blank) quartz, glass, nylon and PTFE (teflon) filters. Performed study concern the influence of different type of filters to varing moisture and temperature conditions. The water contents in filter blanks were determined by Karl Fischer coulometric titration. Obtained results indicate that PTFE are less vulnerable to any rise in RH [%] compared to quartz, glass or even nylon. Thus they should be used in measurement campaigns where water can influence filter gravimetry. Performed calculations indicate that the water presence in PTFE filters under 75% RH constitute about 0,04 of the filter mass while under 38% RH about 0,02% of the filter mass]. This will be shortly published. In case of quartz filters those levels are about 1,85 of the filters mass and 0,82%. This will be shortly published. I reccomend You to look for Canepari and Perrino works regarding PM-bound water.
@Kamila Widziewicz
0.04 of the fillter mass or 0.04 percent of the filter mass ? Can you please clear this doubt.
Thanks for the detailed response
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